--- /dev/null
+/* packet-ieee80211.c
+ * Routines for Wireless LAN (IEEE 802.11) dissection
+ * Copyright 2000, Axis Communications AB
+ * Inquiries/bugreports should be sent to Johan.Jorgensen@axis.com
+ *
+ * $Id: packet-ieee80211.c,v 1.1 2000/11/15 05:41:42 guy Exp $
+ *
+ * Ethereal - Network traffic analyzer
+ * By Gerald Combs <gerald@unicom.net>
+ * Copyright 1998 Gerald Combs
+ *
+ * Copied from README.developer
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#ifdef HAVE_SYS_TYPES_H
+# include <sys/types.h>
+#endif
+
+#ifdef HAVE_NETINET_IN_H
+# include <netinet/in.h>
+#endif
+
+#ifdef NEED_SNPRINTF_H
+# ifdef HAVE_STDARG_H
+# include <stdarg.h>
+# else
+# include <varargs.h>
+# endif
+# include "snprintf.h"
+#endif
+
+#include <string.h>
+#include <glib.h>
+#include "proto.h"
+#include "etypes.h"
+#include "packet.h"
+#include "packet-llc.h"
+#include "packet-ieee80211.h"
+
+/* ************************************************************************* */
+/* Miscellaneous Constants */
+/* ************************************************************************* */
+#define SHORT_STR 128
+#define MGT_FRAME_LEN 24
+
+/* ************************************************************************* */
+/* Insane macro used to convert from the even more insane IEEE octet format */
+/* to a more sane format used by the rest of the world!!! */
+/* ************************************************************************* */
+#define I2H8(x) \
+ ({ guint8 __result__; \
+ __result__ = (( (x) & 0x01) << 7); \
+ __result__ |= (( (x) & 0x02) << 5); \
+ __result__ |= (( (x) & 0x04) << 3); \
+ __result__ |= (( (x) & 0x08) << 1); \
+ __result__ |= (( (x) & 0x10) >> 1); \
+ __result__ |= (( (x) & 0x20) >> 3); \
+ __result__ |= (( (x) & 0x40) >> 5); \
+ __result__ |= (( (x) & 0x80) >> 8); \
+ __result__; })
+
+
+/* ************************************************************************* */
+/* Define some very useful macros that are used to analyze frame types etc. */
+/* ************************************************************************* */
+#define COMPOSE_FRAME_TYPE(x) (((x & 0x0C)<< 2)+((x & 0xF0) >> 4)) /* Create key to (sub)type */
+#define COOK_PROT_VERSION(x) ((x & 0x3))
+#define COOK_FRAME_TYPE(x) ((x & 0xC) >> 2)
+#define COOK_FRAME_SUBTYPE(x) ((x & 0xF0) >> 4)
+#define COOK_ADDR_SELECTOR(x) (((x & 0x200) >> 8) + ((x & 0x100) >> 8))
+
+#define COOK_FRAGMENT_NUMBER(x) (x & 0x000F)
+#define COOK_SEQUENCE_NUMBER(x) ((x & 0xFFF0) >> 4)
+#define COOK_FLAGS(x) ((x & 0xFF00) >> 8)
+#define COOK_DS_STATUS(x) (x & 0x3)
+#define COL_SHOW_INFO(fd,info) if (check_col(fd,COL_INFO)) \
+col_add_str(fd,COL_INFO,info);
+
+#define IS_TO_DS(x) ((x & 0x100) >> 8)
+#define IS_FROM_DS(x) ((x & 0x200) >> 9)
+#define HAVE_FRAGMENTS(x) ((x & 0x400) >> 10)
+#define IS_RETRY(x) ((x & 0x800) >> 11)
+#define POWER_MGT_STATUS(x) ((x & 0x1000))
+#define HAS_MORE_DATA(x) ((x & 0x2000))
+#define IS_WEP(x) ((x & 0x4000))
+#define IS_STRICTLY_ORDERED(x) ((x & 0x8000))
+
+#define MGT_RESERVED_RANGE(x) (((x>=0x06)&&(x<=0x07))||((x>=0x0D)&&(x<=0x0F)))
+#define CTRL_RESERVED_RANGE(x) ((x>=0x10)&&(x<=0x19))
+#define DATA_RESERVED_RANGE(x) ((x>=0x28)&&(x<=0x2f))
+#define SPEC_RESERVED_RANGE(x) ((x>=0x30)&&(x<=0x3f))
+
+
+/* ************************************************************************* */
+/* Constants used to identify cooked frame types */
+/* ************************************************************************* */
+#define MGT_FRAME 0x00 /* Frame type is management */
+#define CONTROL_FRAME 0x01 /* Frame type is control */
+#define DATA_FRAME 0x02 /* Frame type is Data */
+
+#define DATA_SHORT_HDR_LEN 24
+#define DATA_LONG_HDR_LEN 30
+#define MGT_FRAME_HDR_LEN 24 /* Length of Managment frame-headers */
+#define CTLR
+#define MGT_ASSOC_REQ 0x00 /* Management - association request */
+#define MGT_ASSOC_RESP 0x01 /* Management - association response */
+#define MGT_REASSOC_REQ 0x02 /* Management - reassociation request */
+#define MGT_REASSOC_RESP 0x03 /* Management - reassociation response */
+#define MGT_PROBE_REQ 0x04 /* Management - Probe request */
+#define MGT_PROBE_RESP 0x05 /* Management - Probe response */
+#define MGT_BEACON 0x08 /* Management - Beacon frame */
+#define MGT_ATIM 0x09 /* Management - ATIM */
+#define MGT_DISASS 0x0A /* Management - Disassociation */
+#define MGT_AUTHENTICATION 0x0B /* Management - Authentication */
+#define MGT_DEAUTHENTICATION 0x0C /* Management - Deauthentication */
+
+#define CTRL_PS_POLL 0x1A /* Control - power-save poll */
+#define CTRL_RTS 0x1B /* Control - request to send */
+#define CTRL_CTS 0x1C /* Control - clear to send */
+#define CTRL_ACKNOWLEDGEMENT 0x1D /* Control - acknowledgement */
+#define CTRL_CFP_END 0x1E /* Control - contention-free period end */
+#define CTRL_CFP_ENDACK 0x1F /* Control - contention-free period end/ack */
+
+#define DATA 0x20 /* Data - Data */
+#define DATA_CF_ACK 0x21 /* Data - Data + CF acknowledge */
+#define DATA_CF_POLL 0x22 /* Data - Data + CF poll */
+#define DATA_CF_ACK_POLL 0x23 /* Data - Data + CF acknowledge & CF poll */
+#define DATA_NULL_FUNCTION 0x24 /* Data - Null function (no data) */
+#define DATA_CF_ACK_NOD 0x25 /* Data - CF ack (no data) */
+#define DATA_CF_ACK_POLL_NOD 0x26 /* Data - CF ack + CF poll (no data) */
+
+#define DATA_ADDR_T1 0x00
+#define DATA_ADDR_T2 0x01
+#define DATA_ADDR_T3 0x02
+#define DATA_ADDR_T4 0x03
+
+
+/* ************************************************************************* */
+/* Macros used to extract information about fixed fields */
+/* ************************************************************************* */
+#define ESS_SET(x) ((x & 0x0001))
+#define IBSS_SET(x) ((x & 0x0002))
+
+
+
+/* ************************************************************************* */
+/* Logical field codes (dissector's encoding of fixed fields) */
+/* ************************************************************************* */
+#define FIELD_TIMESTAMP 0x01 /* 64-bit timestamp */
+#define FIELD_BEACON_INTERVAL 0x02 /* 16-bit beacon interval */
+#define FIELD_CAP_INFO 0x03 /* Add capability information tree */
+#define FIELD_AUTH_ALG 0x04 /* Authentication algorithm used */
+#define FIELD_AUTH_TRANS_SEQ 0x05 /* Authentication sequence number */
+#define FIELD_CURRENT_AP_ADDR 0x06
+#define FIELD_LISTEN_IVAL 0x07
+#define FIELD_REASON_CODE 0x08
+#define FIELD_ASSOC_ID 0x09
+#define FIELD_STATUS_CODE 0x0A
+
+/* ************************************************************************* */
+/* Logical field codes (IEEE 802.11 encoding of tags) */
+/* ************************************************************************* */
+#define TAG_SSID 0x00
+#define TAG_SUPP_RATES 0x01
+#define TAG_FH_PARAMETER 0x02
+#define TAG_DS_PARAMETER 0x03
+#define TAG_CF_PARAMETER 0x04
+#define TAG_TIM 0x05
+#define TAG_IBSS_PARAMETER 0x06
+#define TAG_CHALLENGE_TEXT 0x10
+
+
+/* ************************************************************************* */
+/* Various constants used in this module */
+/* ************************************************************************* */
+static const char *capture_proto_name = "IEEE 802.11";
+
+
+static int proto_wlan = -1;
+/* ************************************************************************* */
+/* Header field info values for FC-field */
+/* ************************************************************************* */
+static int hf_fc_field = -1;
+static int hf_fc_proto_version = -1;
+static int hf_fc_frame_type = -1;
+static int hf_fc_frame_subtype = -1;
+
+static int hf_fc_flags = -1;
+static int hf_fc_to_ds = -1;
+static int hf_fc_from_ds = -1;
+static int hf_fc_data_ds = -1;
+
+static int hf_fc_more_frag = -1;
+static int hf_fc_retry = -1;
+static int hf_fc_pwr_mgt = -1;
+static int hf_fc_more_data = -1;
+static int hf_fc_wep = -1;
+static int hf_fc_order = -1;
+
+
+/* ************************************************************************* */
+/* Header values for Duration/ID field */
+/* ************************************************************************* */
+static int hf_did_duration = -1;
+
+
+
+/* ************************************************************************* */
+/* Header values for different address-fields (all 4 of them) */
+/* ************************************************************************* */
+static int hf_addr_da = -1; /* Destination address subfield */
+static int hf_addr_sa = -1; /* Source address subfield */
+static int hf_addr_ra = -1; /* Receiver address subfield */
+static int hf_addr_ta = -1; /* Transmitter address subfield */
+static int hf_addr_bssid = -1; /* address is bssid */
+
+
+
+/* ************************************************************************* */
+/* Header values for sequence number field */
+/* ************************************************************************* */
+static int hf_frag_number = -1;
+static int hf_seq_number = -1;
+
+/* ************************************************************************* */
+/* Header values for Frame Check field */
+/* ************************************************************************* */
+static int hf_fcs = -1;
+
+
+/* ************************************************************************* */
+/* Fixed fields found in mgt frames */
+/* ************************************************************************* */
+static int ff_auth_alg = -1; /* Authentication algorithm field */
+static int ff_auth_seq = -1; /* Authentication transaction sequence */
+static int ff_current_ap = -1; /* Current AP MAC address */
+static int ff_listen_ival = -1; /* Listen interval fixed field */
+static int ff_timestamp = -1; /* 64 bit timestamp */
+static int ff_beacon_interval = -1; /* 16 bit Beacon interval */
+static int ff_assoc_id = -1; /* 16 bit AID field */
+static int ff_reason = -1; /* 16 bit reason code */
+static int ff_status_code = -1; /* Status code */
+
+/* ************************************************************************* */
+/* Flags found in the capability field (fixed field) */
+/* ************************************************************************* */
+static int ff_capture = -1;
+static int ff_cf_sta_poll = -1; /* CF pollable status for a STA */
+static int ff_cf_ap_poll = -1; /* CF pollable status for an AP */
+static int ff_cf_ess = -1;
+static int ff_cf_ibss = -1;
+static int ff_cf_privacy = -1;
+
+/* ************************************************************************* */
+/* Tagged value format fields */
+/* ************************************************************************* */
+static int tag_number = -1;
+static int tag_length = -1;
+static int tag_interpretation = -1;
+
+
+
+static int hf_fixed_parameters = -1; /* Protocol payload for management frames */
+static int hf_tagged_parameters = -1; /* Fixed payload item */
+
+/* ************************************************************************* */
+/* Protocol trees */
+/* ************************************************************************* */
+static gint ett_80211 = -1;
+static gint ett_proto_flags = -1;
+static gint ett_cap_tree = -1;
+static gint ett_fc_tree = -1;
+static gint ett_fixed_parameters = -1;
+static gint ett_tagged_parameters = -1;
+/* ************************************************************************* */
+/* */
+/* ************************************************************************* */
+int
+find_header_length (const u_char * pd, int offset)
+{
+ guint16 frame_control;
+
+ frame_control = pntohs (pd);
+ return ((IS_FROM_DS (frame_control))
+ && (IS_TO_DS (frame_control))) ? 30 : 24;
+}
+
+
+/* ************************************************************************* */
+/* This is the capture function used to update packet counts */
+/* ************************************************************************* */
+void
+capture_ieee80211 (const u_char * pd, int offset, packet_counts * ld)
+{
+ guint16 fcf, hdr_length;
+
+ fcf = pntohs (*((guint *) pd));
+
+
+ hdr_length = MGT_FRAME_HDR_LEN; /* Set the header length of the frame */
+
+ switch (COMPOSE_FRAME_TYPE (fcf))
+ {
+
+ case DATA: /* We got a data frame */
+ hdr_length = find_header_length (pd, offset);
+ capture_llc (pd, offset + hdr_length, ld);
+ break;
+
+ case DATA_CF_ACK: /* Data with ACK */
+ hdr_length = find_header_length (pd, offset);
+ capture_llc (pd, offset + hdr_length, ld);
+ break;
+
+ case DATA_CF_POLL:
+ hdr_length = find_header_length (pd, offset);
+ capture_llc (pd, offset + hdr_length, ld);
+ break;
+
+ case DATA_CF_ACK_POLL:
+ hdr_length = find_header_length (pd, offset);
+ capture_llc (pd, offset + hdr_length, ld);
+ break;
+
+ default:
+ ld->other++;
+ break;
+ }
+}
+
+
+
+/* ************************************************************************* */
+/* Add the subtree used to store the fixed parameters */
+/* ************************************************************************* */
+static proto_tree *
+get_fixed_parameter_tree (proto_tree * tree, tvbuff_t *tvb, int start, int size)
+{
+ proto_item *fixed_fields;
+ fixed_fields =
+ proto_tree_add_uint_format (tree, hf_fixed_parameters, tvb, start,
+ size, size, "Fixed parameters (%d bytes)",
+ size);
+
+ return proto_item_add_subtree (fixed_fields, ett_fixed_parameters);
+}
+
+
+/* ************************************************************************* */
+/* Add the subtree used to store tagged parameters */
+/* ************************************************************************* */
+static proto_tree *
+get_tagged_parameter_tree (proto_tree * tree, tvbuff_t *tvb, int start, int size)
+{
+ proto_item *tagged_fields;
+
+ tagged_fields = proto_tree_add_uint_format (tree, hf_tagged_parameters,
+ tvb,
+ start,
+ size,
+ size,
+ "Tagged parameters (%d bytes)",
+ size);
+
+ return proto_item_add_subtree (tagged_fields, ett_tagged_parameters);
+}
+
+
+
+/* ************************************************************************* */
+/* Dissect and add fixed mgmt fields to protocol tree */
+/* ************************************************************************* */
+static void
+add_fixed_field (proto_tree * tree, tvbuff_t * tvb, int offset, int lfcode)
+{
+ guint8 *dataptr;
+ char out_buff[SHORT_STR];
+ guint16 *temp16;
+ proto_item *cap_item;
+ static proto_tree *cap_tree;
+
+ switch (lfcode)
+ {
+ case FIELD_TIMESTAMP:
+ dataptr = tvb_get_ptr (tvb, offset, 8);
+ memset (out_buff, 0, SHORT_STR);
+ snprintf (out_buff, SHORT_STR, "0x%02X%02X%02X%02X%02X%02X%02X%02X",
+ I2H8 (dataptr[7]),
+ I2H8 (dataptr[6]),
+ I2H8 (dataptr[5]),
+ I2H8 (dataptr[4]),
+ I2H8 (dataptr[3]),
+ I2H8 (dataptr[2]), I2H8 (dataptr[1]), I2H8 (dataptr[0]));
+
+ proto_tree_add_string (tree, ff_timestamp, tvb, offset, 8, out_buff);
+ break;
+
+
+ case FIELD_BEACON_INTERVAL:
+ dataptr = tvb_get_ptr (tvb, offset, 2);
+ out_buff[0] = I2H8 (dataptr[1]);
+ out_buff[1] = I2H8 (dataptr[0]);
+ temp16 = (guint16 *) out_buff;
+ proto_tree_add_uint (tree, ff_beacon_interval, tvb, offset, 2,
+ pntohs (temp16));
+ break;
+
+
+ case FIELD_CAP_INFO:
+ dataptr = tvb_get_ptr (tvb, offset, 2);
+ out_buff[0] = I2H8 (dataptr[1]);
+ out_buff[0] = I2H8 (dataptr[0]);
+ temp16 = (guint16 *) out_buff;
+
+ cap_item = proto_tree_add_uint_format (tree, ff_capture,
+ tvb, offset, 2,
+ pntohs (temp16),
+ "Capability Information: %04X",
+ pntohs (temp16));
+ cap_tree = proto_item_add_subtree (cap_item, ett_cap_tree);
+ proto_tree_add_boolean (cap_tree, ff_cf_ess, tvb, offset, 1,
+ pntohs (temp16));
+ proto_tree_add_boolean (cap_tree, ff_cf_ibss, tvb, offset, 1,
+ pntohs (temp16));
+ proto_tree_add_boolean (cap_tree, ff_cf_privacy, tvb, offset, 1,
+ pntohs (temp16));
+ if (ESS_SET (pntohs (temp16)) != 0) /* This is an AP */
+ proto_tree_add_uint (cap_tree, ff_cf_ap_poll, tvb, offset, 2,
+ ((pntohs (temp16) & 0xC) >> 2));
+
+ else /* This is a STA */
+ proto_tree_add_uint (cap_tree, ff_cf_sta_poll, tvb, offset, 2,
+ ((pntohs (temp16) & 0xC) >> 2));
+ break;
+
+
+ case FIELD_AUTH_ALG:
+ dataptr = tvb_get_ptr (tvb, offset, 2);
+ out_buff[0] = I2H8 (dataptr[1]);
+ out_buff[1] = I2H8 (dataptr[0]);
+ temp16 = (guint16 *) out_buff;
+ proto_tree_add_uint (tree, ff_auth_alg, tvb, offset, 2,
+ pntohs (temp16));
+ break;
+
+
+ case FIELD_AUTH_TRANS_SEQ:
+ dataptr = tvb_get_ptr (tvb, offset, 2);
+ out_buff[0] = I2H8 (dataptr[1]);
+ out_buff[1] = I2H8 (dataptr[0]);
+ temp16 = (guint16 *) out_buff;
+ proto_tree_add_uint (tree, ff_auth_seq, tvb, offset, 2,
+ pntohs (temp16));
+ break;
+
+
+ case FIELD_CURRENT_AP_ADDR:
+ dataptr = tvb_get_ptr (tvb, offset, 6);
+ memset (out_buff, 0, SHORT_STR);
+ out_buff[0] = I2H8 (dataptr[5]);
+ out_buff[1] = I2H8 (dataptr[4]);
+ out_buff[2] = I2H8 (dataptr[3]);
+ out_buff[3] = I2H8 (dataptr[2]);
+ out_buff[4] = I2H8 (dataptr[1]);
+ out_buff[5] = I2H8 (dataptr[0]);
+
+ proto_tree_add_string (tree, ff_current_ap, tvb, offset, 6, out_buff);
+ break;
+
+
+ case FIELD_LISTEN_IVAL:
+ dataptr = tvb_get_ptr (tvb, offset, 2);
+ out_buff[0] = I2H8 (dataptr[1]);
+ out_buff[1] = I2H8 (dataptr[0]);
+ temp16 = (guint16 *) out_buff;
+ proto_tree_add_uint (tree, ff_listen_ival, tvb, offset, 2,
+ pntohs (temp16));
+ break;
+
+
+ case FIELD_REASON_CODE:
+ dataptr = tvb_get_ptr (tvb, offset, 2);
+ out_buff[0] = I2H8 (dataptr[1]);
+ out_buff[1] = I2H8 (dataptr[0]);
+ temp16 = (guint16 *) out_buff;
+ proto_tree_add_uint (tree, ff_reason, tvb, offset, 2, pntohs (temp16));
+ break;
+
+
+ case FIELD_ASSOC_ID:
+ dataptr = tvb_get_ptr (tvb, offset, 2);
+ out_buff[0] = I2H8 (dataptr[1]);
+ out_buff[1] = I2H8 (dataptr[0]);
+ temp16 = (guint16 *) out_buff;
+ proto_tree_add_uint (tree, ff_assoc_id, tvb, offset, 2, pntohs (temp16));
+ break;
+
+ case FIELD_STATUS_CODE:
+ dataptr = tvb_get_ptr (tvb, offset, 2);
+ out_buff[0] = I2H8 (dataptr[1]);
+ out_buff[1] = I2H8 (dataptr[0]);
+ temp16 = (guint16 *) out_buff;
+ proto_tree_add_uint (tree, ff_status_code, tvb, offset, 2,
+ pntohs (temp16));
+ break;
+ }
+}
+
+
+/* ************************************************************************* */
+/* Dissect and add tagged (optional) fields to proto tree */
+/* ************************************************************************* */
+static int
+add_tagged_field (proto_tree * tree, tvbuff_t * tvb, int offset)
+{
+ guint8 *tag_info_ptr;
+ guint8 *tag_data_ptr;
+ guint32 tag_no, tag_len;
+ int i, n;
+ char out_buff[SHORT_STR];
+
+
+ tag_info_ptr = tvb_get_ptr (tvb, offset, 2);
+ tag_no = tag_info_ptr[0];
+ tag_len = tag_info_ptr[1];
+
+ tag_data_ptr = tvb_get_ptr (tvb, offset + 2, tag_len);
+
+
+ if ((tag_no >= 17) && (tag_no <= 31))
+ { /* Reserved for challenge text */
+ proto_tree_add_uint_format (tree, tag_number, tvb, offset, 1, tag_no,
+ "Tag Number: %d (Reserved for challenge text)",
+ tag_no);
+
+ proto_tree_add_uint (tree, tag_length, tvb, offset + 1, 1, tag_len);
+ proto_tree_add_string (tree, tag_interpretation, tvb, offset + 2,
+ tag_len, "Not interpreted");
+ return (int) tag_len;
+ }
+
+ /* Next See if tag is reserved - if true, skip it! */
+ if (((tag_no >= 7) && (tag_no <= 15))
+ || ((tag_no >= 32) && (tag_no <= 255)))
+ {
+ proto_tree_add_uint_format (tree, tag_number, tvb, offset, 1, tag_no,
+ "Tag Number: %d (Reserved tag number)",
+ tag_no);
+
+ proto_tree_add_uint (tree, tag_length, tvb, offset + 1, 1, tag_len);
+
+ proto_tree_add_string (tree, tag_interpretation, tvb, offset + 2,
+ tag_len, "Not interpreted");
+ return (int) tag_len;
+ }
+
+
+ switch (tag_info_ptr[0])
+ {
+
+
+ case TAG_SSID:
+ proto_tree_add_uint_format (tree, tag_number, tvb, offset, 1, tag_no,
+ "Tag Number: %d (SSID parameter set)",
+ tag_no);
+
+ proto_tree_add_uint (tree, tag_length, tvb, offset + 1, 1, tag_len);
+
+ memset (out_buff, 0, SHORT_STR);
+
+ memcpy (out_buff, tag_data_ptr, (size_t) tag_len);
+ out_buff[tag_len + 1] = 0;
+
+ proto_tree_add_string (tree, tag_interpretation, tvb, offset + 2,
+ tag_len, out_buff);
+ break;
+
+
+
+ case TAG_SUPP_RATES:
+ proto_tree_add_uint_format (tree, tag_number, tvb, offset, 1, tag_no,
+ "Tag Number: %d (Supported Rates)", tag_no);
+
+ proto_tree_add_uint (tree, tag_length, tvb, offset + 1, 1, tag_len);
+
+ memset (out_buff, 0, SHORT_STR);
+ strcpy (out_buff, "Supported rates: ");
+ n = strlen (out_buff);
+
+ for (i = 0; i < tag_len; i++)
+ {
+
+ if (tag_data_ptr[i] >= 128)
+ {
+ tag_data_ptr[i] -= 128;
+ n += snprintf (out_buff + n, SHORT_STR - n, "%2.1f ", (float)
+ (((float) tag_data_ptr[i]) * 0.5));
+ }
+
+ else
+ n += snprintf (out_buff + n, SHORT_STR - n, "%2.1f ", (float)
+ (((float) tag_data_ptr[i]) * 0.5));
+
+ }
+ snprintf (out_buff + n, SHORT_STR - n, "[Mbit/sec]");
+
+ proto_tree_add_string (tree, tag_interpretation, tvb, offset + 2,
+ tag_len, out_buff);
+ break;
+
+
+
+ case TAG_FH_PARAMETER:
+ proto_tree_add_uint_format (tree, tag_number, tvb, offset, 1, tag_no,
+ "Tag Number: %d (FH Parameter set)",
+ tag_no);
+
+ proto_tree_add_uint (tree, tag_length, tvb, offset + 1, 1, tag_len);
+ memset (out_buff, 0, SHORT_STR);
+
+ snprintf (out_buff, SHORT_STR,
+ "Dwell time 0x%04X, Hop Set %2d, Hop Pattern %2d, "
+ "Hop Index %2d", pntohs (tag_data_ptr), tag_data_ptr[2],
+ tag_data_ptr[3], tag_data_ptr[4]);
+
+ proto_tree_add_string (tree, tag_interpretation, tvb, offset + 2,
+ tag_len, out_buff);
+ break;
+
+
+
+ case TAG_DS_PARAMETER:
+ proto_tree_add_uint_format (tree, tag_number, tvb, offset, 1, tag_no,
+ "Tag Number: %d (DS Parameter set)",
+ tag_no);
+
+ proto_tree_add_uint (tree, tag_length, tvb, offset + 1, 1, tag_len);
+ memset (out_buff, 0, SHORT_STR);
+
+ snprintf (out_buff, SHORT_STR, "Current Channel: %d", tag_data_ptr[0]);
+ proto_tree_add_string (tree, tag_interpretation, tvb, offset + 2,
+ tag_len, out_buff);
+ break;
+
+
+ case TAG_CF_PARAMETER:
+ proto_tree_add_uint_format (tree, tag_number, tvb, offset, 1, tag_no,
+ "Tag Number: %d (CF Parameter set)",
+ tag_no);
+
+ proto_tree_add_uint (tree, tag_length, tvb, offset + 1, 1, tag_len);
+ memset (out_buff, 0, SHORT_STR);
+
+ snprintf (out_buff, SHORT_STR,
+ "CFP count %d, CFP period %d, CFP max duration %d, "
+ "CFP Remaining %d", tag_data_ptr[0], tag_data_ptr[1],
+ pntohs (tag_data_ptr + 2), pntohs (tag_data_ptr + 4));
+
+ proto_tree_add_string (tree, tag_interpretation, tvb, offset + 2,
+ tag_len, out_buff);
+ break;
+
+
+ case TAG_TIM:
+ proto_tree_add_uint_format (tree, tag_number, tvb, offset, 1, tag_no,
+ "Tag Number: %d (CF Parameter set)",
+ tag_no);
+
+ proto_tree_add_uint (tree, tag_length, tvb, offset + 1, 1, tag_len);
+ memset (out_buff, 0, SHORT_STR);
+ snprintf (out_buff, SHORT_STR,
+ "DTIM count %d, DTIM period %d, Bitmap control 0x%X, "
+ "(Bitmap suppressed)", tag_data_ptr[0], tag_data_ptr[1],
+ tag_data_ptr[2]);
+ proto_tree_add_string (tree, tag_interpretation, tvb, offset + 2,
+ tag_len, out_buff);
+ break;
+
+
+
+ case TAG_IBSS_PARAMETER:
+ proto_tree_add_uint_format (tree, tag_number, tvb, offset, 1, tag_no,
+ "Tag Number: %d (IBSS Parameter set)",
+ tag_no);
+
+ proto_tree_add_uint (tree, tag_length, tvb, offset + 1, 1, tag_len);
+ memset (out_buff, 0, SHORT_STR);
+ snprintf (out_buff, SHORT_STR, "ATIM window 0x%X",
+ pntohs (tag_data_ptr));
+
+ proto_tree_add_string (tree, tag_interpretation, tvb, offset + 2,
+ tag_len, out_buff);
+ break;
+
+
+
+ case TAG_CHALLENGE_TEXT:
+ proto_tree_add_uint_format (tree, tag_number, tvb, offset, 1, tag_no,
+ "Tag Number: %d (Challenge text)", tag_no);
+
+ proto_tree_add_uint (tree, tag_length, tvb, offset + 1, 1, tag_len);
+ memset (out_buff, 0, SHORT_STR);
+ snprintf (out_buff, SHORT_STR, "Challenge text: %.47s", tag_data_ptr);
+ proto_tree_add_string (tree, tag_interpretation, tvb, offset, tag_len,
+ out_buff);
+
+ break;
+
+ default:
+ return 0;
+ }
+
+ return tag_len + 2;
+}
+
+
+
+/* ************************************************************************* */
+/* Dissect 802.11 frame */
+/* ************************************************************************* */
+void
+dissect_ieee80211 (tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree)
+{
+ guint16 fcf, flags;
+ guint8 *src = NULL, *dst = NULL;
+ proto_item *ti;
+ proto_item *flag_item;
+ proto_item *fc_item;
+ static proto_tree *hdr_tree;
+ static proto_tree *flag_tree;
+ static proto_tree *fixed_tree;
+ static proto_tree *tagged_tree;
+ static proto_tree *fc_tree;
+ guint16 cap_len, hdr_len;
+ tvbuff_t *next_tvb;
+ guint32 next_idx;
+ guint32 addr_type;
+
+ cap_len = pinfo->captured_len;
+ fcf = tvb_get_letohs (tvb, 0);
+
+ pinfo->current_proto = capture_proto_name;
+
+ if (check_col (pinfo->fd, COL_PROTOCOL))
+ col_add_str (pinfo->fd, COL_PROTOCOL, "IEEE 802.11");
+
+ /* Add the FC to the current tree */
+ if (tree)
+ {
+ hdr_len = find_header_length (tvb_get_ptr (tvb, 0, cap_len), 0);
+ ti = proto_tree_add_protocol_format (tree, proto_wlan, tvb, 0, hdr_len,
+ "IEEE 802.11 Header");
+ hdr_tree = proto_item_add_subtree (ti, ett_80211);
+
+ fc_item =
+ proto_tree_add_uint_format (hdr_tree, hf_fc_field, tvb, 0, 2,
+ tvb_get_letohs (tvb, 0),
+ "Frame Control: 0x%04X",
+ tvb_get_letohs (tvb, 0));
+
+ fc_tree = proto_item_add_subtree (fc_item, ett_fc_tree);
+
+
+ proto_tree_add_uint (fc_tree, hf_fc_proto_version, tvb, 0, 1,
+ COOK_PROT_VERSION (tvb_get_letohs (tvb, 0)));
+
+ proto_tree_add_uint (fc_tree, hf_fc_frame_type, tvb, 0, 1,
+ COOK_FRAME_TYPE (tvb_get_letohs (tvb, 0)));
+
+ proto_tree_add_uint (fc_tree, hf_fc_frame_subtype,
+ tvb, 0, 1,
+ COOK_FRAME_SUBTYPE (tvb_get_letohs (tvb, 0)));
+
+ flags = COOK_FLAGS (tvb_get_letohs (tvb, 0));
+
+ flag_item =
+ proto_tree_add_uint_format (fc_tree, hf_fc_flags, tvb, 1, 1,
+ flags, "Flags: 0x%X", flags);
+
+ flag_tree = proto_item_add_subtree (flag_item, ett_proto_flags);
+
+ proto_tree_add_uint (flag_tree, hf_fc_data_ds, tvb, 1, 1,
+ COOK_DS_STATUS (flags));
+
+ /* proto_tree_add_boolean(flag_tree,hf_fc_to_ds,tvb,1,1,
+ flags);
+
+ proto_tree_add_boolean(flag_tree,hf_fc_from_ds,tvb,1,1,
+ flags); */
+
+ proto_tree_add_boolean (flag_tree, hf_fc_more_frag, tvb, 1, 1,
+ flags);
+
+ proto_tree_add_boolean (flag_tree, hf_fc_retry, tvb, 1, 1, flags);
+
+ proto_tree_add_boolean (flag_tree, hf_fc_pwr_mgt, tvb, 1, 1, flags);
+
+ proto_tree_add_boolean (flag_tree, hf_fc_more_data, tvb, 1, 1,
+ flags);
+
+ proto_tree_add_boolean (flag_tree, hf_fc_wep, tvb, 1, 1, flags);
+
+ proto_tree_add_boolean (flag_tree, hf_fc_order, tvb, 1, 1, flags);
+
+ proto_tree_add_uint (hdr_tree, hf_did_duration, tvb, 2, 2,
+ tvb_get_ntohs (tvb, 2));
+
+ }
+
+ /* Perform Tasks which are common to a certain frame type */
+ switch (COOK_FRAME_TYPE (fcf))
+ {
+
+ case MGT_FRAME: /* All management frames share a common header */
+ src = tvb_get_ptr (tvb, 10, 6);
+ dst = tvb_get_ptr (tvb, 4, 6);
+
+
+ if (check_col (pinfo->fd, COL_DEF_SRC))
+ col_add_fstr (pinfo->fd, COL_DEF_SRC, "%X:%X:%X:%X:%X:%X",
+ src[0], src[1], src[2], src[3], src[4], src[5]);
+
+ if (check_col (pinfo->fd, COL_DEF_DST))
+ col_add_fstr (pinfo->fd, COL_DEF_DST, "%X:%X:%X:%X:%X:%X",
+ dst[0], dst[1], dst[2], dst[3], dst[4], dst[5]);
+
+ if (tree)
+ {
+ proto_tree_add_ether (hdr_tree, hf_addr_da, tvb, 4, 6,
+ tvb_get_ptr (tvb, 4, 6));
+
+ proto_tree_add_ether (hdr_tree, hf_addr_sa, tvb, 10, 6,
+ tvb_get_ptr (tvb, 10, 6));
+
+ proto_tree_add_ether (hdr_tree, hf_addr_bssid, tvb, 16, 6,
+ tvb_get_ptr (tvb, 16, 6));
+
+ proto_tree_add_uint (hdr_tree, hf_frag_number, tvb, 22, 2,
+ COOK_FRAGMENT_NUMBER (tvb_get_ntohs
+ (tvb, 22)));
+
+ proto_tree_add_uint (hdr_tree, hf_seq_number, tvb, 22, 2,
+ COOK_SEQUENCE_NUMBER (tvb_get_ntohs
+ (tvb, 22)));
+ cap_len = cap_len - MGT_FRAME_LEN - 4;
+ }
+ break;
+
+
+
+ case CONTROL_FRAME:
+ break;
+
+
+
+ case DATA_FRAME:
+ addr_type = COOK_ADDR_SELECTOR (fcf);
+
+ /* In order to show src/dst address we must always do the following */
+ switch (addr_type)
+ {
+
+ case DATA_ADDR_T1:
+ src = tvb_get_ptr (tvb, 10, 6);
+ dst = tvb_get_ptr (tvb, 4, 6);
+ break;
+
+
+ case DATA_ADDR_T2:
+ src = tvb_get_ptr (tvb, 16, 6);
+ dst = tvb_get_ptr (tvb, 4, 6);
+ break;
+
+
+ case DATA_ADDR_T3:
+ src = tvb_get_ptr (tvb, 10, 6);
+ dst = tvb_get_ptr (tvb, 16, 6);
+ break;
+
+
+ case DATA_ADDR_T4:
+ src = tvb_get_ptr (tvb, 24, 6);
+ dst = tvb_get_ptr (tvb, 16, 6);
+ break;
+ }
+
+ if (check_col (pinfo->fd, COL_DEF_SRC))
+ col_add_fstr (pinfo->fd, COL_DEF_SRC,
+ "%2.2X:%2.2X:%2.2X:%2.2X:%2.2X:%2.2X",
+ src[0], src[1], src[2], src[3], src[4], src[5]);
+
+ if (check_col (pinfo->fd, COL_DEF_DST))
+ col_add_fstr (pinfo->fd, COL_DEF_DST,
+ "%2.2X:%2.2X:%2.2X:%2.2X:%2.2X:%2.2X",
+ dst[0], dst[1], dst[2], dst[3], dst[4], dst[5]);
+
+ /* Now if we have a tree we start adding stuff */
+ if (tree)
+ {
+
+
+ switch (addr_type)
+ {
+
+ case DATA_ADDR_T1:
+ proto_tree_add_ether (hdr_tree, hf_addr_da, tvb, 4, 6,
+ tvb_get_ptr (tvb, 4, 6));
+ proto_tree_add_ether (hdr_tree, hf_addr_sa, tvb, 10, 6,
+ tvb_get_ptr (tvb, 10, 6));
+ proto_tree_add_ether (hdr_tree, hf_addr_bssid, tvb, 16, 6,
+ tvb_get_ptr (tvb, 16, 6));
+ break;
+
+
+ case DATA_ADDR_T2:
+ proto_tree_add_ether (hdr_tree, hf_addr_da, tvb, 4, 6,
+ tvb_get_ptr (tvb, 4, 6));
+ proto_tree_add_ether (hdr_tree, hf_addr_bssid, tvb, 10, 6,
+ tvb_get_ptr (tvb, 10, 6));
+ proto_tree_add_ether (hdr_tree, hf_addr_sa, tvb, 16, 6,
+ tvb_get_ptr (tvb, 16, 6));
+ break;
+
+
+ case DATA_ADDR_T3:
+ proto_tree_add_ether (hdr_tree, hf_addr_bssid, tvb, 4, 6,
+ tvb_get_ptr (tvb, 4, 6));
+ proto_tree_add_ether (hdr_tree, hf_addr_sa, tvb, 10, 6,
+ tvb_get_ptr (tvb, 10, 6));
+ proto_tree_add_ether (hdr_tree, hf_addr_da, tvb, 16, 6,
+ tvb_get_ptr (tvb, 16, 6));
+ break;
+
+
+ case DATA_ADDR_T4:
+ proto_tree_add_ether (hdr_tree, hf_addr_ra, tvb, 4, 6,
+ tvb_get_ptr (tvb, 4, 6));
+ proto_tree_add_ether (hdr_tree, hf_addr_ta, tvb, 10, 6,
+ tvb_get_ptr (tvb, 10, 6));
+ proto_tree_add_ether (hdr_tree, hf_addr_da, tvb, 16, 6,
+ tvb_get_ptr (tvb, 16, 6));
+ proto_tree_add_ether (hdr_tree, hf_addr_sa, tvb, 24, 6,
+ tvb_get_ptr (tvb, 24, 6));
+ break;
+
+ }
+
+ }
+ break;
+ }
+
+
+ switch (COMPOSE_FRAME_TYPE (fcf))
+ {
+
+ case MGT_ASSOC_REQ:
+ COL_SHOW_INFO (pinfo->fd, "Association Request");
+ if (tree)
+ {
+ fixed_tree = get_fixed_parameter_tree (tree, tvb, MGT_FRAME_LEN, 4);
+ add_fixed_field (fixed_tree, tvb, MGT_FRAME_HDR_LEN,
+ FIELD_CAP_INFO);
+ add_fixed_field (fixed_tree, tvb, MGT_FRAME_HDR_LEN + 2,
+ FIELD_LISTEN_IVAL);
+
+ next_idx = MGT_FRAME_HDR_LEN + 4; /* Size of fixed fields */
+ tagged_tree = get_tagged_parameter_tree (tree, tvb, next_idx,
+ pinfo->captured_len - 4 -
+ next_idx);
+
+
+ while (pinfo->captured_len > (next_idx + 4))
+ next_idx += add_tagged_field (tagged_tree, tvb, next_idx);
+ }
+ break;
+
+
+
+ case MGT_ASSOC_RESP:
+ COL_SHOW_INFO (pinfo->fd, "Association Response");
+
+ if (tree)
+ {
+ fixed_tree = get_fixed_parameter_tree (tree, tvb, MGT_FRAME_LEN, 6);
+ add_fixed_field (fixed_tree, tvb, MGT_FRAME_LEN, FIELD_CAP_INFO);
+ add_fixed_field (fixed_tree, tvb, MGT_FRAME_LEN + 2,
+ FIELD_STATUS_CODE);
+ add_fixed_field (fixed_tree, tvb, MGT_FRAME_LEN + 4,
+ FIELD_ASSOC_ID);
+
+ next_idx = MGT_FRAME_LEN + 6; /* Size of fixed fields */
+
+ tagged_tree = get_tagged_parameter_tree (tree, tvb, next_idx,
+ pinfo->captured_len - 4 -
+ next_idx);
+
+ while (pinfo->captured_len > (next_idx + 4))
+ next_idx += add_tagged_field (tagged_tree, tvb, next_idx);
+
+ }
+ break;
+
+ case MGT_REASSOC_REQ:
+ COL_SHOW_INFO (pinfo->fd, "Reassociation Request");
+ if (tree)
+ {
+ fixed_tree = get_fixed_parameter_tree (tree, tvb, MGT_FRAME_LEN, 10);
+ add_fixed_field (fixed_tree, tvb, MGT_FRAME_LEN, FIELD_CAP_INFO);
+ add_fixed_field (fixed_tree, tvb, MGT_FRAME_LEN + 2,
+ FIELD_LISTEN_IVAL);
+ add_fixed_field (fixed_tree, tvb, MGT_FRAME_LEN + 4,
+ FIELD_CURRENT_AP_ADDR);
+
+ next_idx = MGT_FRAME_LEN + 10; /* Size of fixed fields */
+ tagged_tree = get_tagged_parameter_tree (tree, tvb, next_idx,
+ pinfo->captured_len - 4 -
+ next_idx);
+
+ while ((pinfo->captured_len) > (next_idx + 4))
+ next_idx += add_tagged_field (tagged_tree, tvb, next_idx);
+ }
+ break;
+
+ case MGT_REASSOC_RESP:
+ COL_SHOW_INFO (pinfo->fd, "Reassociation Response");
+ if (tree)
+ {
+ fixed_tree = get_fixed_parameter_tree (tree, tvb, MGT_FRAME_LEN, 10);
+ add_fixed_field (fixed_tree, tvb, MGT_FRAME_LEN, FIELD_CAP_INFO);
+ add_fixed_field (fixed_tree, tvb, MGT_FRAME_LEN + 2,
+ FIELD_STATUS_CODE);
+ add_fixed_field (fixed_tree, tvb, MGT_FRAME_LEN + 4,
+ FIELD_ASSOC_ID);
+
+ next_idx = MGT_FRAME_LEN + 6; /* Size of fixed fields */
+ tagged_tree = get_tagged_parameter_tree (tree, tvb, next_idx,
+ pinfo->captured_len - 4 -
+ next_idx);
+
+ while (pinfo->captured_len > (next_idx + 4))
+ next_idx += add_tagged_field (tagged_tree, tvb, next_idx);
+
+
+ }
+ break;
+
+ case MGT_PROBE_REQ:
+ COL_SHOW_INFO (pinfo->fd, "Probe Request");
+ if (tree)
+ {
+ next_idx = MGT_FRAME_LEN;
+ tagged_tree = get_tagged_parameter_tree (tree, tvb, MGT_FRAME_LEN,
+ pinfo->captured_len - 4 -
+ next_idx);
+
+ while (pinfo->captured_len > (next_idx + 4))
+ next_idx += add_tagged_field (tagged_tree, tvb, next_idx);
+ }
+ break;
+
+
+
+ case MGT_PROBE_RESP:
+ COL_SHOW_INFO (pinfo->fd, "Probe Response");
+ if (tree)
+ {
+ fixed_tree = get_fixed_parameter_tree (tree, tvb, MGT_FRAME_LEN, 12);
+ add_fixed_field (fixed_tree, tvb, MGT_FRAME_LEN, FIELD_TIMESTAMP);
+ add_fixed_field (fixed_tree, tvb, MGT_FRAME_LEN + 8,
+ FIELD_BEACON_INTERVAL);
+ add_fixed_field (fixed_tree, tvb, MGT_FRAME_LEN + 10,
+ FIELD_CAP_INFO);
+
+ next_idx = MGT_FRAME_LEN + 12; /* Size of fixed fields */
+ tagged_tree = get_tagged_parameter_tree (tree, tvb, next_idx,
+ pinfo->captured_len - 4 -
+ next_idx);
+
+ while ((pinfo->captured_len) > (next_idx + 4))
+ next_idx += add_tagged_field (tagged_tree, tvb, next_idx);
+ }
+ break;
+
+
+ case MGT_BEACON: /* Dissect protocol payload fields */
+ COL_SHOW_INFO (pinfo->fd, "Beacon frame");
+
+ if (tree)
+ {
+ fixed_tree = get_fixed_parameter_tree (tree, tvb, MGT_FRAME_LEN, 12);
+
+ add_fixed_field (fixed_tree, tvb, MGT_FRAME_LEN, FIELD_TIMESTAMP);
+
+ add_fixed_field (fixed_tree, tvb, MGT_FRAME_LEN + 8,
+ FIELD_BEACON_INTERVAL);
+ add_fixed_field (fixed_tree, tvb, MGT_FRAME_LEN + 10,
+ FIELD_CAP_INFO);
+
+ next_idx = MGT_FRAME_LEN + 12; /* Size of fixed fields */
+ tagged_tree = get_tagged_parameter_tree (tree, tvb, next_idx,
+ pinfo->captured_len - 4 -
+ next_idx);
+
+ while (pinfo->captured_len > (next_idx + 4))
+ next_idx += add_tagged_field (tagged_tree, tvb, next_idx);
+
+ }
+ break;
+
+
+
+ case MGT_ATIM:
+ COL_SHOW_INFO (pinfo->fd, "ATIM");
+ if (tree)
+ {
+ }
+ break;
+
+ case MGT_DISASS:
+ COL_SHOW_INFO (pinfo->fd, "Dissassociate");
+ if (tree)
+ {
+ fixed_tree =
+ get_fixed_parameter_tree (tree, tvb, MGT_FRAME_LEN, cap_len);
+ add_fixed_field (fixed_tree, tvb, MGT_FRAME_LEN, FIELD_REASON_CODE);
+ }
+ break;
+
+ case MGT_AUTHENTICATION:
+ COL_SHOW_INFO (pinfo->fd, "Authentication");
+ if (tree)
+ {
+ fixed_tree = get_fixed_parameter_tree (tree, tvb, MGT_FRAME_LEN, 6);
+ add_fixed_field (fixed_tree, tvb, MGT_FRAME_LEN, FIELD_AUTH_ALG);
+ add_fixed_field (fixed_tree, tvb, MGT_FRAME_LEN + 2,
+ FIELD_AUTH_TRANS_SEQ);
+ add_fixed_field (fixed_tree, tvb, MGT_FRAME_LEN + 4,
+ FIELD_STATUS_CODE);
+
+ next_idx = MGT_FRAME_LEN + 6; /* Size of fixed fields */
+
+ if ((pinfo->captured_len - next_idx - 4) != 0)
+ {
+ tagged_tree = get_tagged_parameter_tree (tree,
+ tvb,
+ next_idx,
+ pinfo->captured_len -
+ next_idx - 4);
+
+ while ((pinfo->captured_len) > (next_idx - 4))
+ next_idx += add_tagged_field (tagged_tree, tvb, next_idx);
+ }
+ }
+ break;
+
+ case MGT_DEAUTHENTICATION:
+ COL_SHOW_INFO (pinfo->fd, "Deauthentication");
+ if (tree)
+ {
+ fixed_tree = get_fixed_parameter_tree (hdr_tree, tvb, MGT_FRAME_LEN, 2);
+ add_fixed_field (fixed_tree, tvb, MGT_FRAME_LEN, FIELD_REASON_CODE);
+ }
+ break;
+
+
+
+ case CTRL_PS_POLL:
+ COL_SHOW_INFO (pinfo->fd, "Power-Save poll");
+
+ src = tvb_get_ptr (tvb, 10, 6);
+ dst = tvb_get_ptr (tvb, 4, 6);
+
+
+ if (check_col (pinfo->fd, COL_DEF_SRC))
+ col_add_fstr (pinfo->fd, COL_DEF_SRC,
+ "%2.2X:%2.2X:%2.2X:%2.2X:%2.2X:%2.2X (BSSID)",
+ src[0], src[1], src[2], src[3], src[4], src[5]);
+
+ if (check_col (pinfo->fd, COL_DEF_DST))
+ col_add_fstr (pinfo->fd, COL_DEF_DST,
+ "%2.2X:%2.2X:%2.2X:%2.2X:%2.2X:%2.2X (TA)",
+ dst[0], dst[1], dst[2], dst[3], dst[4], dst[5]);
+
+ if (tree)
+ {
+ proto_tree_add_ether (hdr_tree, hf_addr_bssid, tvb, 4, 6,
+ tvb_get_ptr (tvb, 4, 6));
+
+ proto_tree_add_ether (hdr_tree, hf_addr_ta, tvb, 10, 6,
+ tvb_get_ptr (tvb, 10, 6));
+
+ }
+ break;
+
+
+
+ case CTRL_RTS:
+ COL_SHOW_INFO (pinfo->fd, "Request-to-send");
+ src = tvb_get_ptr (tvb, 10, 6);
+ dst = tvb_get_ptr (tvb, 4, 6);
+
+
+ if (check_col (pinfo->fd, COL_DEF_SRC))
+ col_add_fstr (pinfo->fd, COL_DEF_SRC,
+ "%2.2X:%2.2X:%2.2X:%2.2X:%2.2X:%2.2X (TA)",
+ src[0], src[1], src[2], src[3], src[4], src[5]);
+
+ if (check_col (pinfo->fd, COL_DEF_DST))
+ col_add_fstr (pinfo->fd, COL_DEF_DST,
+ "%2.2X:%2.2X:%2.2X:%2.2X:%2.2X:%2.2X (RA)",
+ dst[0], dst[1], dst[2], dst[3], dst[4], dst[5]);
+
+ if (tree)
+ {
+ proto_tree_add_ether (hdr_tree, hf_addr_ra, tvb, 4, 6,
+ tvb_get_ptr (tvb, 4, 6));
+
+ proto_tree_add_ether (hdr_tree, hf_addr_ta, tvb, 10, 6,
+ tvb_get_ptr (tvb, 10, 6));
+
+ }
+ break;
+
+
+
+ case CTRL_CTS:
+ COL_SHOW_INFO (pinfo->fd, "Clear-to-send");
+
+ dst = tvb_get_ptr (tvb, 4, 6);
+
+ if (check_col (pinfo->fd, COL_DEF_DST))
+ col_add_fstr (pinfo->fd, COL_DEF_DST,
+ "%2.2X:%2.2X:%2.2X:%2.2X:%2.2X:%2.2X (RA)",
+ dst[0], dst[1], dst[2], dst[3], dst[4], dst[5]);
+
+ if (tree)
+ {
+ proto_tree_add_ether (hdr_tree, hf_addr_ra, tvb, 4, 6,
+ tvb_get_ptr (tvb, 4, 6));
+
+ }
+ break;
+
+
+
+ case CTRL_ACKNOWLEDGEMENT:
+ COL_SHOW_INFO (pinfo->fd, "Acknowledgement");
+
+ dst = tvb_get_ptr (tvb, 4, 6);
+
+ if (check_col (pinfo->fd, COL_DEF_DST))
+ col_add_fstr (pinfo->fd, COL_DEF_DST,
+ "%2.2X:%2.2X:%2.2X:%2.2X:%2.2X:%2.2X (RA)",
+ dst[0], dst[1], dst[2], dst[3], dst[4], dst[5]);
+
+ if (tree)
+ proto_tree_add_ether (hdr_tree, hf_addr_ra, tvb, 4, 6,
+ tvb_get_ptr (tvb, 4, 6));
+ break;
+
+
+
+ case CTRL_CFP_END:
+ COL_SHOW_INFO (pinfo->fd, "CF-End (Control-frame)");
+
+ src = tvb_get_ptr (tvb, 10, 6);
+ dst = tvb_get_ptr (tvb, 4, 6);
+
+
+ if (check_col (pinfo->fd, COL_DEF_SRC))
+ col_add_fstr (pinfo->fd, COL_DEF_SRC, "%X:%X:%X:%X:%X:%X (BSSID)",
+ src[0], src[1], src[2], src[3], src[4], src[5]);
+
+ if (check_col (pinfo->fd, COL_DEF_DST))
+ col_add_fstr (pinfo->fd, COL_DEF_DST, "%X:%X:%X:%X:%X:%X (RA)",
+ dst[0], dst[1], dst[2], dst[3], dst[4], dst[5]);
+
+ if (tree)
+ {
+ proto_tree_add_uint (hdr_tree, hf_did_duration, tvb, 2, 2,
+ tvb_get_ntohs (tvb, 2));
+
+ proto_tree_add_ether (hdr_tree, hf_addr_ra, tvb, 4, 6,
+ tvb_get_ptr (tvb, 4, 6));
+
+ proto_tree_add_ether (hdr_tree, hf_addr_bssid, tvb, 10, 6,
+ tvb_get_ptr (tvb, 10, 6));
+
+ }
+ break;
+
+
+
+ case CTRL_CFP_ENDACK:
+ COL_SHOW_INFO (pinfo->fd, "CF-End + CF-Ack (Control-frame)");
+
+ src = tvb_get_ptr (tvb, 10, 6);
+ dst = tvb_get_ptr (tvb, 4, 6);
+
+ if (check_col (pinfo->fd, COL_DEF_SRC))
+ col_add_fstr (pinfo->fd, COL_DEF_SRC, "%X:%X:%X:%X:%X:%X (BSSID)",
+ src[0], src[1], src[2], src[3], src[4], src[5]);
+
+ if (check_col (pinfo->fd, COL_DEF_DST))
+ col_add_fstr (pinfo->fd, COL_DEF_DST, "%X:%X:%X:%X:%X:%X (RA)",
+ dst[0], dst[1], dst[2], dst[3], dst[4], dst[5]);
+
+ if (tree)
+ {
+ proto_tree_add_uint (hdr_tree, hf_did_duration, tvb, 2, 2,
+ tvb_get_ntohs (tvb, 2));
+
+ proto_tree_add_ether (hdr_tree, hf_addr_ra, tvb, 4, 6,
+ tvb_get_ptr (tvb, 4, 6));
+
+ proto_tree_add_ether (hdr_tree, hf_addr_bssid, tvb, 10, 6,
+ tvb_get_ptr (tvb, 10, 6));
+
+ }
+ break;
+
+
+
+ case DATA:
+ COL_SHOW_INFO (pinfo->fd, "Data");
+ if (tree)
+ {
+ hdr_len = find_header_length (tvb_get_ptr (tvb, 0, cap_len), 0);
+
+ next_tvb = tvb_new_subset (tvb, hdr_len, -1, -1);
+ dissect_llc (next_tvb, pinfo, tree);
+
+ }
+ break;
+
+
+
+ case DATA_CF_ACK:
+ COL_SHOW_INFO (pinfo->fd, "Data + CF-Acknowledgement");
+ if (tree)
+ {
+ hdr_len = find_header_length (tvb_get_ptr (tvb, 0, cap_len), 0);
+
+ next_tvb = tvb_new_subset (tvb, hdr_len, -1, -1);
+ dissect_llc (next_tvb, pinfo, tree);
+ }
+ break;
+
+
+
+ case DATA_CF_POLL:
+ COL_SHOW_INFO (pinfo->fd, "Data + CF-Poll");
+ if (tree)
+ {
+ hdr_len = find_header_length (tvb_get_ptr (tvb, 0, cap_len), 0);
+ next_tvb = tvb_new_subset (tvb, hdr_len, -1, -1);
+ dissect_llc (next_tvb, pinfo, tree);
+ }
+ break;
+
+
+
+ case DATA_CF_ACK_POLL:
+ COL_SHOW_INFO (pinfo->fd, "Data + CF-Acknowledgement/Poll");
+ if (tree)
+ {
+ hdr_len = find_header_length (tvb_get_ptr (tvb, 0, cap_len), 0);
+ next_tvb = tvb_new_subset (tvb, hdr_len, -1, -1);
+ dissect_llc (next_tvb, pinfo, tree);
+ }
+ break;
+
+
+
+ case DATA_NULL_FUNCTION:
+ COL_SHOW_INFO (pinfo->fd, "Null function (No data)");
+ break;
+
+
+ case DATA_CF_ACK_NOD:
+ COL_SHOW_INFO (pinfo->fd, "Data + Acknowledgement(No data)");
+ break;
+
+
+
+ case DATA_CF_ACK_POLL_NOD:
+ COL_SHOW_INFO (pinfo->fd, "Data + CF-Acknowledgement/Poll (No data)");
+ break;
+
+
+
+ default:
+ COL_SHOW_INFO (pinfo->fd, "Unrecognized (Reserved frame)");
+ break;
+ }
+}
+
+
+void
+proto_register_wlan (void)
+{
+
+ static const value_string tofrom_ds[] = {
+ {0, "Network operating in AD-HOC mode ( To DS: 0 From DS: 0)"},
+ {1, "Frame is exiting DS (To DS: 0 From DS: 1)"},
+ {2, "Frame is entering DS (To DS: 0 From DS: 1)"},
+ {3, "Frame part of WDS (To DS: 1 From DS: 1)"},
+ {0, NULL}
+ };
+
+ static const true_false_string tods_flag = {
+ "TO DS: Should be false",
+ "Not used"
+ };
+
+ static const true_false_string fromds_flag = {
+ "FROM DS: Should be false",
+ "Not used"
+ };
+
+ static const true_false_string more_frags = {
+ "MSDU/MMPDU is fragmented",
+ "No fragments"
+ };
+
+ static const true_false_string retry_flags = {
+ "Frame is being retransmitted",
+ "Frame is not being retransmitted"
+ };
+
+ static const true_false_string pm_flags = {
+ "STA will go to sleep",
+ "STA will stay up"
+ };
+
+ static const true_false_string md_flags = {
+ "Data is buffered for STA at AP",
+ "No data buffered"
+ };
+
+ static const true_false_string wep_flags = {
+ "WEP is enabled",
+ "WEP is disabled"
+ };
+
+ static const true_false_string order_flags = {
+ "",
+ ""
+ };
+
+ static const true_false_string cf_ess_flags = {
+ "Transmitter is an AP",
+ "Transmitter is a STA"
+ };
+
+
+ static const true_false_string cf_privacy_flags = {
+ "AP/STA can support WEP",
+ "AP/STA cannot support WEP"
+ };
+
+
+ static const true_false_string cf_ibss_flags = {
+ "Transmitter belongs to an IBSS",
+ "Transmitter belongs to a BSS"
+ };
+
+ static const value_string sta_cf_pollable[] = {
+ {0x00, "Station is not CF-Pollable"},
+ {0x02, "Station is CF-Pollable, "
+ "not requesting to be placed on the CF-polling list"},
+ {0x01, "Station is CF-Pollable, "
+ "requesting to be placed on the CF-polling list"},
+ {0x03, "Station is CF-Pollable, requesting never to be polled"},
+ {0, NULL}
+ };
+
+ static const value_string ap_cf_pollable[] = {
+ {0x00, "No point coordinator at AP"},
+ {0x02, "Point coordinator at AP for delivery only (no polling)"},
+ {0x01, "Point coordinator at AP for delivery and polling"},
+ {0x03, "Reserved"},
+ {0, NULL}
+ };
+
+
+ static const value_string auth_alg[] = {
+ {0x00, "Open System"},
+ {0x01, "Shared key"},
+ {0, NULL}
+ };
+
+ static const value_string reason_codes[] = {
+ {0x00, "Reserved"},
+ {0x01, "Unspecified reason"},
+ {0x02, "Previous authentication no longer valid"},
+ {0x03, "Deauthenticated because sending STA is leaving (has left) "
+ "IBSS or ESS"},
+ {0x04, "Disassociated due to inactivity"},
+ {0x05, "Disassociated because AP is unable to handle all currently "
+ "associated stations"},
+ {0x06, "Class 2 frame received from nonauthenticated station"},
+ {0x07, "Class 3 frame received from nonassociated station"},
+ {0x08, "Disassociated because sending STA is leaving (has left) BSS"},
+ {0x09, "Station requesting (re)association is not authenticated with "
+ "responding station"},
+ {0x00, NULL}
+ };
+
+
+ static const value_string status_codes[] = {
+ {0x00, "Successful"},
+ {0x01, "Unspecified failure"},
+ {0x0A, "Cannot support all requested capabilities in the "
+ "Capability information field"},
+ {0x0B, "Reassociation denied due to inability to confirm that "
+ "association exists"},
+ {0x0C, "Association denied due to reason outside the scope of this "
+ "standard"},
+
+ {0x0D, "Responding station does not support the specified authentication "
+ "algorithm"},
+ {0x0E, "Received an Authentication frame with authentication sequence "
+ "transaction sequence number out of expected sequence"},
+ {0x0F, "Authentication rejected because of challenge failure"},
+ {0x10, "Authentication rejected due to timeout waiting for next "
+ "frame in sequence"},
+ {0x11, "Association denied because AP is unable to handle additional "
+ "associated stations"},
+ {0x12, "Association denied due to requesting station not supporting all "
+ "of the datarates in the BSSBasicServiceSet Parameter"},
+ {0x00, NULL}
+ };
+
+
+
+ static hf_register_info hf[] = {
+ {&hf_fc_field,
+ {"Frame Control Field", "wlan.fc", FT_UINT16, BASE_HEX, NULL, 0,
+ "MAC Frame control"}},
+
+ {&hf_fc_proto_version,
+ {"Version", "wlan.fc.version", FT_UINT8, BASE_DEC, NULL, 0,
+ "MAC Protocol version"}}, /* 0 */
+
+ {&hf_fc_frame_type,
+ {"Type", "wlan.fc.type", FT_UINT8, BASE_DEC, NULL, 0,
+ "Frame type"}},
+
+ {&hf_fc_frame_subtype,
+ {"Subtype", "wlan.fc.subtype", FT_UINT8, BASE_DEC, NULL, 0,
+ "Frame subtype"}}, /* 2 */
+
+ {&hf_fc_flags,
+ {"Protocol Flags", "wlan.flags", FT_UINT8, BASE_HEX, NULL, 0,
+ "Protocol flags"}},
+
+ {&hf_fc_data_ds,
+ {"DS status", "wlan.fc.ds", FT_UINT8, BASE_HEX, TFS (&tofrom_ds), 0,
+ "Data-frame DS-traversal status"}}, /* 3 */
+
+ {&hf_fc_to_ds,
+ {"To DS", "wlan.fc.tods", FT_BOOLEAN, 8, TFS (&tods_flag), 0x1,
+ "To DS flag"}}, /* 4 */
+
+ {&hf_fc_from_ds,
+ {"From DS", "wlan.fc.fromds", FT_BOOLEAN, 8, TFS (&fromds_flag), 0x2,
+ "From DS flag"}}, /* 5 */
+
+ {&hf_fc_more_frag,
+ {"Fragments", "wlan.fc.frag", FT_BOOLEAN, 8, TFS (&more_frags), 0x4,
+ "More Fragments flag"}}, /* 6 */
+
+ {&hf_fc_retry,
+ {"Retry", "wlan.fc.retry", FT_BOOLEAN, 8, TFS (&retry_flags), 0x8,
+ "Retransmission flag"}},
+
+ {&hf_fc_pwr_mgt,
+ {"PWR MGT", "wlan.fc.pwrmgt", FT_BOOLEAN, 8, TFS (&pm_flags), 0x10,
+ "Power management status"}},
+
+ {&hf_fc_more_data,
+ {"More Data", "wlan.fc.moredata", FT_BOOLEAN, 8, TFS (&md_flags), 0x20,
+ "More data flag"}},
+
+ {&hf_fc_wep,
+ {"WEP flag", "wlan.fc.wep", FT_BOOLEAN, 8, TFS (&wep_flags), 0x40,
+ "WEP flag"}},
+
+ {&hf_fc_order,
+ {"Order flag", "wlan.fc.order", FT_BOOLEAN, 8, TFS (&order_flags), 0x80,
+ "Strictly ordered flag"}},
+
+ {&hf_did_duration,
+ {"Duration", "wlan.duration", FT_UINT16, BASE_DEC, NULL, 0,
+ "Duration field"}},
+
+ {&hf_addr_da,
+ {"Destination address", "wlan.da", FT_ETHER, BASE_NONE, NULL, 0,
+ "Destination Hardware address"}},
+
+ {&hf_addr_sa,
+ {"Source address", "wlan.sa", FT_ETHER, BASE_NONE, NULL, 0,
+ "Source Hardware address"}},
+
+ {&hf_addr_ra,
+ {"Receiver address", "wlan.ra", FT_ETHER, BASE_NONE, NULL, 0,
+ "Receiving Station Hardware Address"}},
+
+ {&hf_addr_ta,
+ {"Transmitter address", "wlan.ta", FT_ETHER, BASE_NONE, NULL, 0,
+ "Transmitting Station Hardware Address"}},
+
+ {&hf_addr_bssid,
+ {"BSS Id", "wlan.bssid", FT_ETHER, BASE_NONE, NULL, 0,
+ "Basic Service Set ID"}},
+
+ {&hf_frag_number,
+ {"Fragment number", "wlan.frag", FT_UINT16, BASE_HEX, NULL, 0,
+ "Fragment number"}},
+
+ {&hf_seq_number,
+ {"Sequence number", "wlan.seq", FT_UINT16, BASE_HEX, NULL, 0,
+ "Fragment number"}},
+
+ {&hf_fcs,
+ {"Frame Check Sequence (not verified)", "wlan.fcs", FT_UINT32, BASE_HEX,
+ NULL, 0, ""}},
+
+ {&ff_timestamp,
+ {"Timestamp", "wlan.fixed.timestamp", FT_STRING, BASE_NONE,
+ NULL, 0, ""}},
+
+ {&ff_auth_alg,
+ {"Authentication Algorithm", "wlan.fixed.auth.alg",
+ FT_UINT16, BASE_DEC, VALS (&auth_alg), 0, ""}},
+
+ {&ff_beacon_interval,
+ {"Beacon Interval", "wlan.fixed.beacon", FT_UINT16, BASE_DEC, NULL, 0,
+ ""}},
+
+ {&hf_fixed_parameters,
+ {"Fixed parameters", "wlan.fixed.all", FT_UINT16, BASE_DEC, NULL, 0,
+ ""}},
+
+ {&hf_tagged_parameters,
+ {"Tagged parameters", "wlan.tagged.all", FT_UINT16, BASE_DEC, NULL, 0,
+ ""}},
+
+ {&ff_capture,
+ {"Capabilities", "wlan.fixed.capabilities", FT_UINT16, BASE_HEX, NULL, 0,
+ "Capability information"}},
+
+ {&ff_cf_sta_poll,
+ {"CFP participation capabilities", "wlan.fixed.capabilities.cfpoll.sta",
+ FT_UINT16, BASE_HEX, VALS (&sta_cf_pollable), 0,
+ "CF-Poll capabilities for a STA"}},
+
+ {&ff_cf_ap_poll,
+ {"CFP participation capabilities", "wlan.fixed.capabilities.cfpoll.ap",
+ FT_UINT16, BASE_HEX, VALS (&ap_cf_pollable), 0,
+ "CF-Poll capabilities for an AP"}},
+
+ {&ff_cf_ess,
+ {"ESS capabilities", "wlan.fixed.capabilities.ess",
+ FT_BOOLEAN, 1, TFS (&cf_ess_flags), 0x0001, "ESS capabilities"}},
+
+
+ {&ff_cf_ibss,
+ {"IBSS status", "wlan.fixed.capabilities.ibss",
+ FT_BOOLEAN, 1, TFS (&cf_ibss_flags), 0x0002, "IBSS participation"}},
+
+ {&ff_cf_privacy,
+ {"Privacy", "wlan.fixed.capabilities.privacy",
+ FT_BOOLEAN, 1, TFS (&cf_privacy_flags), 0x0010, "WEP support"}},
+
+
+ {&ff_auth_seq,
+ {"Authentication SEQ", "wlan.fixed.auth_seq",
+ FT_UINT16, BASE_HEX, NULL, 0, "Authentication sequence number"}},
+
+ {&ff_assoc_id,
+ {"Association ID", "wlan.fixed.aid",
+ FT_UINT16, BASE_HEX, NULL, 0, "Association ID"}},
+
+ {&ff_listen_ival,
+ {"Listen Interval", "wlan.fixed.listen_ival",
+ FT_UINT16, BASE_HEX, NULL, 0, "Listen Interval"}},
+
+ {&ff_current_ap,
+ {"Current AP", "wlan.fixed.current_ap",
+ FT_ETHER, BASE_NONE, NULL, 0, "MAC address of current AP"}},
+
+ {&ff_reason,
+ {"Reason code", "wlan.fixed.reason_code",
+ FT_UINT16, BASE_HEX, VALS (&reason_codes), 0,
+ "Reason for unsolicited notification"}},
+
+ {&ff_status_code,
+ {"Status code", "wlan.fixed.status_code",
+ FT_UINT16, BASE_HEX, VALS (&status_codes), 0,
+ "Status of requested event"}},
+
+ {&tag_number,
+ {"Tag", "wlan.tag.number",
+ FT_UINT16, BASE_DEC, NULL, 0,
+ "Element ID"}},
+
+ {&tag_length,
+ {"Tag length", "wlan.tag.length",
+ FT_UINT16, BASE_DEC, NULL, 0, "Length of tag"}},
+
+ {&tag_interpretation,
+ {"Tag interpretation", "wlan.tag.interpretation",
+ FT_STRING, BASE_NONE, NULL, 0, "Interpretation of tag"}}
+
+
+ };
+
+
+ static gint *tree_array[] = { &ett_80211,
+ &ett_fc_tree,
+ &ett_proto_flags,
+ &ett_fixed_parameters,
+ &ett_tagged_parameters,
+ &ett_cap_tree,
+ };
+
+ proto_wlan = proto_register_protocol ("Wireless ethernet", "wlan");
+ proto_register_field_array (proto_wlan, hf, array_length (hf));
+ proto_register_subtree_array (tree_array, array_length (tree_array));
+}
git.samba.org / obnox / wireshark / wip.git / commitdiff